{"product_id":"martin-2-0-2","title":"Martin 2-0-2 \/ 2-0-2A — Primary-Source Technical Documentation Collection","description":"\u003cp\u003eThe Martin 2-0-2 was the Glenn L. Martin Company's bold postwar answer to the Douglas DC-3 — a twin-engine, low-wing regional airliner engineered for speed, efficiency, and modern airline operations. Its story is inseparable from one of postwar aviation's most consequential structural engineering episodes: the 1948 wing-root failures that grounded the fleet, triggered sweeping airworthiness directives, and ultimately gave birth to the redesigned 2-0-2A and the pressurized Martin 4-0-4. Online Aviation Library has assembled the surviving primary-source technical documentation spanning the full 2-0-2 \/ 2-0-2A family — manufacturer's handbooks, airline operations manuals, maintenance manuals, and original sales brochures.\u003c\/p\u003e\n\n\u003ch2\u003eWhat This Collection Covers\u003c\/h2\u003e\n\n\u003ch3\u003eStructural Repair Handbook\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandbook of Structural Repair for M-202 \/ 202A\u003c\/strong\u003e — The Glenn L. Martin Company, Baltimore, Maryland. Approved by Albert J. Kullas, D.E.R. 1-11. Approval Date: 24 March 1948; Publishing Date: 15 April 1948; Revised 15 September 1954. Property of Sun'N Fun Aviation Foundation (Inv. #BX1363). The definitive factory structural repair reference for the 2-0-2 \/ 2-0-2A airframe — covering skin repairs, spar splices, and the wing-root chord modifications mandated following the 1948 grounding event.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOperations Manuals\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMartin 202-202A Operations Manual\u003c\/strong\u003e — Allegheny Airlines, Pittsburgh Base, Manual No. 340, issued to W. Litzenberger. Airline-specific operational procedures, performance limits, and emergency checklists as operated by one of the 2-0-2's primary US regional carriers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintenance Manuals\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaintenance Manual for Model 2-0-2 NW Airplane\u003c\/strong\u003e — The Glenn L. Martin Co., Baltimore 3, Maryland, prepared for Northwest Airlines Inc. Reference: G.L.M. Co., SE 47-1. Revised 20 July 1949. The Northwest Airlines-specific maintenance manual, reflecting the 2-0-2's early operational configuration before the structural redesign program.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eManufacturer Sales \u0026amp; Marketing Documentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Martin 2-0-2\u003c\/strong\u003e — Original manufacturer's sales brochure, The Glenn L. Martin Company, Baltimore 3, MD, U.S.A. Illustrated with the factory line-art of the aircraft in Martin livery — a primary-source marketing document from the aircraft's launch period.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMartin Executive Two-Two\u003c\/strong\u003e — VIP\/executive configuration sales brochure for the Martin 202, presenting the aircraft as a corporate transport. Navy and gold presentation format with the Martin star logo — a rare surviving piece of the 2-0-2's commercial marketing history.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAerodynamic \u0026amp; Wing Design Studies\u003c\/h3\u003e\n\u003cp\u003eThe 2-0-2's low-wing cantilever monoplane configuration — with an 864 sq ft (80.3 m²) all-metal monocoque wing — was designed for high-efficiency cruise and rapid climb. Large trailing-edge flaps reduced approach speeds to 66 knots but introduced significant pitching moments. Wind tunnel assessments at MIT and Georgia Tech initially cleared the wing profile; real-world operations exposed severe multi-axial aerodynamic loading at the wing-root junctions that the tunnel data had not predicted.\u003c\/p\u003e\n\n\u003ch3\u003eEngine Technical Notes\u003c\/h3\u003e\n\u003cp\u003eThe 2-0-2 was powered by dual \u003cstrong\u003ePratt \u0026amp; Whitney R-2800 CA-18 Double Wasp\u003c\/strong\u003e 18-cylinder, two-row, air-cooled radial engines delivering 1,800 hp (1,300 kW) normal output and up to 2,400 hp (1,800 kW) with water injection for takeoff. Propulsion was via 3-bladed Hamilton Standard 2H17K3-48R reversible-pitch airscrews (13 ft 1 in diameter). Engine documentation covers thrust metrics, fuel-flow optimization, compressor boundaries, and the inboard wing mounting configuration with integrated cooling ducting.\u003c\/p\u003e\n\n\u003ch3\u003eHandling \u0026amp; Stability Studies\u003c\/h3\u003e\n\u003cp\u003eNASA Technical Report Server (NTRS) data and MIT\/Georgia Tech wind tunnel evaluations documented the 2-0-2's handling qualities: generally satisfactory stability under standard cruise limits, but with problematic longitudinal trim changes during flap deployment and marginal elevator control margins in landing configuration. Aerodynamicists ultimately concluded that a fixed stabilizer design yielded no worse longitudinal trim behavior than the original overly complex adjustable mechanism linked to the flaps.\u003c\/p\u003e\n\n\u003ch3\u003eEngineering Bulletins \u0026amp; Structural Fixes\u003c\/h3\u003e\n\u003cp\u003eThe August 1948 catastrophic structural failure of Northwest Orient Airlines Flight 421 triggered the most consequential engineering investigation in the 2-0-2's history. The airframe's 7075-T6 aluminum (zinc-alloyed) proved highly susceptible to micro-fracturing and stress-corrosion cracking at the wing-root fittings. \u003cstrong\u003eService Instruction Letter No. 29\u003c\/strong\u003e — later integrated into FAA Airworthiness Directive 54-06-02 — mandated immediate inspection and rework of the wing lower chord scarf splices at wing Stations 187 LH and RH due to improperly installed splice bushings. The resulting 2-0-2A redesign incorporated a completely reworked wing interior structure and upgraded CB-16 engine variants.\u003c\/p\u003e\n\n\u003ch2\u003ePerformance Data Reference\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMetric\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Takeoff Weight (MTOW)\u003c\/td\u003e\n\u003ctd\u003e39,900 lb (18,098 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmpty Weight\u003c\/td\u003e\n\u003ctd\u003e25,086 lb (11,379 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Cruising Speed\u003c\/td\u003e\n\u003ctd\u003e270 knots (311 mph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApproach Speed (Stall)\u003c\/td\u003e\n\u003ctd\u003e66 knots (76 mph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInitial Rate of Climb\u003c\/td\u003e\n\u003ctd\u003e2,200 ft\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eService Ceiling\u003c\/td\u003e\n\u003ctd\u003e33,000 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Range\u003c\/td\u003e\n\u003ctd\u003e522 nm (635 miles)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTakeoff Distance (over 50-ft obstacle)\u003c\/td\u003e\n\u003ctd\u003e1,565 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eDocument Manifest\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eTitle \/ Focus Area\u003c\/th\u003e\n\u003cth\u003eDate\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStructural Repair Handbook\u003c\/td\u003e\n\u003ctd\u003eHandbook of Structural Repair — M-202 \/ 202A (Glenn L. Martin Co.)\u003c\/td\u003e\n\u003ctd\u003eApr. 1948 \/ Rev. Sep. 1954\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperations Manual\u003c\/td\u003e\n\u003ctd\u003eMartin 202-202A Operations Manual — Allegheny Airlines, Manual No. 340\u003c\/td\u003e\n\u003ctd\u003ec. 1950s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaintenance Manual (NW)\u003c\/td\u003e\n\u003ctd\u003eMaintenance Manual — Model 2-0-2 NW (for Northwest Airlines Inc.)\u003c\/td\u003e\n\u003ctd\u003eRev. Jul. 1949\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSales Brochure\u003c\/td\u003e\n\u003ctd\u003eThe Martin 2-0-2 — Manufacturer's Sales Brochure\u003c\/td\u003e\n\u003ctd\u003ec. 1947\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExecutive Brochure\u003c\/td\u003e\n\u003ctd\u003eMartin Executive Two-Two — VIP Configuration Brochure\u003c\/td\u003e\n\u003ctd\u003ec. 1947–1948\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNASA\/NTRS Studies\u003c\/td\u003e\n\u003ctd\u003eAerodynamic \u0026amp; handling quality evaluations (MIT \/ Georgia Tech wind tunnel)\u003c\/td\u003e\n\u003ctd\u003eVarious\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEngineering Bulletins\u003c\/td\u003e\n\u003ctd\u003eWing-root structural fixes, Service Instruction Letter No. 29, FAA AD 54-06-02\u003c\/td\u003e\n\u003ctd\u003e1948–1954\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cbr\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eRegulatory Notice:\u003c\/strong\u003e Under FAA 14 CFR § 43.13 and EASA Part-M, any mechanic performing maintenance on an active aircraft must use current, manufacturer-approved revision-controlled data. This archival document does not satisfy that requirement.\u003c\/p\u003e\n\n\u003cp\u003eThis is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorized distributor.\u003c\/p\u003e\n\n\u003cp\u003eLiving Collections with Free Lifetime Updates – Please review our Legal Notice and Export Notice before purchasing.\u003c\/p\u003e","brand":"Online Aviation Library","offers":[{"title":"Default Title","offer_id":53744008692059,"sku":null,"price":28.85,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0955\/4788\/3867\/files\/martin-2-0-2-northwest-airlines-archival-banner.png?v=1786281683","url":"https:\/\/onlineaviationlibrary.com\/products\/martin-2-0-2","provider":"Online Aviation Library","version":"1.0","type":"link"}